<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>ECharts Network Chart</title>
    <!-- 引入 ECharts 文件 -->
    <script src="https://cdn.jsdelivr.net/npm/echarts/dist/echarts.min.js"></script>
</head>
<body>
<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
<div id="main" style="width: 600px;height:400px;"></div>
<script src="echarts-network.js"></script>
</body>
</html>